orrery

[ awr-uh-ree, or- ]
/ ˈɔr ə ri, ˈɒr- /
|

noun, plural or·rer·ies.

an apparatus for representing the positions, motions, and phases of the planets, satellites, etc., in the solar system.
any of certain similar machines, as a planetarium.

Origin of orrery

First recorded in 1705–15; named after Charles Boyle, Earl of Orrery (1676–1731), for whom it was first made
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British Dictionary definitions for orrery

orrery

/ (ˈɒrərɪ) /

noun plural -ries

a mechanical model of the solar system in which the planets can be moved at the correct relative velocities around the sun

Word Origin for orrery

C18: originally made for Charles Boyle, Earl of Orrery
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012